Table-shears.



Patented luly 3|, I900.-

C. SEYBOLD.

TABLE SHEARS.

(Application filed July 28, 1898.)

(No Modal.)

. UNITED STATES PATENT 1 OFFicE.

CHARLES SEYBOLD, on DAYTON, onto.

,. TABLE-seems";

srnornxcac'r'ron forming s of sass Patent N6. 654,92 5, dated duly 31 1900. Application filed July 28,1898 sails No. 637,115. (No model.)

To all whom, it may concern/.- o I Be it known that I, CHARLESSEYBOLD, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented a certain new and useful Improvement in Table-Shears for Cutting Cardboard, Stiff Paper, and the Like, of which the following is a full, clear, and exact de= scription, reference being had to the accompanyin g drawings, forming part of this specification.

My invention relates to machines for cut-' ting stiff paper, in which a swinging knife is employed operating by hand against a fixed knife to sever the cardboard in proper lengths, the action of the machine being that of a pair of shears.

The improvements consist of a certain novel construction and arrangement of gage and clamp to be hereinafter particularly pointed out and claimed, whereby the clamp may be operated quickly and the gage may be easily and accurately adjusted, and "in which the Wear on the gage adjustments is reduced to a minimum. 7

In the drawings, Figure 1 is a side elevation of my machine. Fig. 2 is a front elevation of same. Fig. 3 is a detail cross-section of one end of the gage-plateand standard, showing the cam for locking the parts together in unlocked position. lar view in locked position. Fig. 5 is a perspective View of one of the locking-plates.

The operating parts are mounted on a substantial framework consisting of side standards A A and a table-top B, supported by same across the rear half of the machine. The

front half of the machine is open between the side standards, and a box or trough O is supported by the standards to receive the cardboards as they are cut.

Secured vertically to the front or inner edge of the table portion of the machine is a stationary knife-blade D, while E is the swinging knife operated by handle a and brought down against the cardboard, so as to give a shearing cut.

The paper-stock to be operated on is held in position by the clamp F, which is mounted to slide up and down on pins b at each end of the table. The ends of this clamp are cou- Fig. 4 is a simipled by e'onnecting-rods c c with the arms 61 d, mounted on shaft G at each end, which shaft stantly and uniformly at each end, so as to bring uniform pressure to bearno matter how narrow or Wide the paper-stock nor whether placed on the middle or either side of the table.

Sliding on the top of the side standards is the gage; plate M, guided by flanges f f, sliding in ways 6 e on the upper inner side edges of'the standards; ivoted at each end of the gage-plate by the links 9 g are the levers NN,

keyed at their lower ends to the shaft P, which is journaled in the standards at the base, while It is a handle by means of which the lovers N N are, oscillated to slide the gageplate back and forth. In this way a perfectlyuniform and accurate movement can be given the gage-plate for adjusting the cut of the shears. In order to lock the gage-plate at anydesired position, I provide the loose plates Z Z, mounted on pins b b on the lower surface of the gage-plate at each end and resting between the ends of the gage and the upper edges of the standards. m m are apair of cam-levers connected together by the con- .necting rod n and pivoted on pins 0 c at each end of the gage-plate. The gage-plate at these points is slotted, so asto allow the cams to bear against the plates Z Z, While p is a handle for shifting the connecting-rod and with it the cams to bring pressure to bear on the plates ll to lock the gage-plate in any desired position.

It will be evident from the foregoing that the movement of the gage-plate will be absolutely uniform throughout and that this plate will always keep its position parallel to the shears, while the gage can be locked instantly at each end in any desired position by shifting the handle 19.

Heretofore in machines of this kind the gage has been adjusted by rack and pinion but with such-construction aftera very little wear there is lost motion at one side or the other, and the gage will not remain exactly parallelwith the knife, and its accuracy is lost. Heretofore, also, it has been customary to lock the gage-plate by a clamp or a screw at each end of the plate, so that in order to tighten or release the plate the operator must pass from one side of the machine to the other. These disadvantages are all obviated by my present construction. The gage-plate being oscillated by the lever-arms at each end must always remain parallel with the knife; and

the plate can be instantly locked in any position from the operating side of the machine alone. 1 I

Havingthus described my invention, what I claim, and desire to secure by Letters Patent, is' v In a table-shears, a sliding gage-plate with ways for guiding same on the standards, oscillating shaft with'lever secured thereto, links for connecting said gage at each end to the levers, and pair of cams, pivoted at each end of the gage-plate, with movable plate resting on the standards against which said cams have a bearing, and a rod connecting said cams,

whereby the shifting of the rod will lock the gage-plate in any desired position on the standards, substantially as vshown and de- Scribed.

CHARLES SEYBOLD.

Witnesses: J. EDWARD SAUER,

Enw. O. LIUXWEILER. 

